Dewatering Pumps

Posted by angroup on August 8, 2023

Dewatering pumps are an essential tool for many construction, mining, tunnels, and other areas where water accumulation can be detrimental industrial applications. These pumps are designed to remove and drain away excess water.

What is a Dewatering Pump?

A dewatering pump, also referred to as a water removal pump, is a mechanical device used to remove water from an area or structure. It operates by creating a pressure differential that forces water to flow from a low-lying area to a higher elevation or a designated drainage system. The primary purpose of a dewatering pump is to keep construction sites, mines, and other areas dry, allowing work to proceed efficiently and safely. Dewatering pumps are offered in a wide range of sizes and configurations to match various water removal applications.

Types of Dewatering Pumps

There are various types of dewatering pumps available, each with its own unique characteristics and applications. The most common types include centrifugal pumps, submersible pumps, wellpoint systems, and vacuum-assisted pumps.

Centrifugal Dewatering Pump

Centrifugal Pumps: These pumps use an impeller to create centrifugal force, which pushes water away from the pump and into a discharge pipe. Centrifugal pumps are widely used due to their high efficiency and ability to handle large volumes of water.


Submersible Dewatering Pumps

Submersible Pumps: Submersible pumps are designed to be fully submerged in water, making them ideal for dewatering applications in deep excavations or confined spaces. These pumps are highly efficient and can handle both clean and dirty water.

Submersible dewatering pumps are designed to operate while fully submerged in the water being pumped. The pump motor and internal components are sealed in a watertight casing that prevents water intrusion even when immersed.

Electric submersible dewatering pumps are typically lowered into wells or sumps. The pumped liquid cools the motor and no priming is required. The units sit at the bottom of the water source and pump water straight from the sump in a single lifting stage.

Submersible pumps push water to the surface through a long discharge pipe or hose connected above grade. They can continuously remove large water volumes when required to maintain very low or completely dry conditions. Submersible units provide an efficient dewatering solution for collecting leaked water from excavations, mines, pits, and holding ponds.

Wellpoint Systems: Wellpoint systems consist of a series of small-diameter wells connected to a vacuum pump. These systems are commonly used in areas with high groundwater levels and are effective in lowering the water table.

Vacuum-Assisted Pumps: Vacuum-assisted pumps utilize a vacuum to draw water into the pump and then discharge it to a higher elevation. These pumps are particularly useful in situations where high suction lift is required.

Factors to Consider When Choosing a Dewatering Pump

Choosing an appropriately sized dewatering pump for the intended application is critical for proper water removal. Key factors to consider when sizing and selecting pumps include:

  • Flow rate required: Match pump capacity to the gallons per minute needed to adequately dewater the site or keep pace with influx.
  • Total head: The pump head refers to the maximum height the pump can lift water. It is crucial to select a pump with sufficient head capacity to overcome the elevation difference between the water source and the discharge point.Account for vertical lift, length and friction losses in discharge piping.
  • Pump Efficiency: Pump efficiency is a measure of how effectively the pump converts power into hydraulic energy. Choosing a pump with high efficiency ensures optimal performance and reduces energy consumption.
  • Solids handling: Pick a pump that can pass solids present without jamming or wear.
  • Pump Construction: The construction material of the pump should be compatible with the type of water being pumped. For example, corrosive or abrasive water may require a pump made from more durable materials.
  • Power Source: Dewatering pumps can be powered by electricity, diesel, or gasoline. The choice of power source depends on the availability of power and the specific requirements of the application.
  • Site conditions: Consider portability needs, available power sources, and space constraints.
  • Duty cycle: Determine if intermittent or continuous pumping is required.
  • Accessories: Include fittings, hoses, pipes, valves needed for proper setup.

Typical Dewatering Pump Applications

Dewatering pumps serve vital water removal roles across many different industries and job sites:

  • Construction sites: Remove rainwater and groundwater from pits and excavations. Facilitate foundation work.
  • Mining sites: Keep mine shafts, pits and tunnels dry for operations. Drain tailings ponds.
  • Industrial plants: Drain flooded areas rapidly in emergencies. Maintain dry work pits. Remove tank leakage.
  • Municipal works: Drain flooded streets, structures, and tunnels. Dewater treatment plants after spills or flooding.
  • Environmental remediation: Pump out containment ponds, secure landfills, and excavated areas. Remove leachate.
  • Agriculture: Drain flooded fields. Remove wastewater from barns. Maintain dry areas for livestock.
  • Events: Provide drainage and dewatering for outdoor concerts, races, and shows.

Having the right dewatering pumps on hand allows these industries to carry out operations and constructions projects as planned despite water accumulation on site.

ANPUMP Dewatering Pump

We offer a full range of dewatering pump options to handle any size job, from compact electric submersible pumps for small residential projects to high-volume diesel-powered pumps for large commercial sites. Our expert team will assess your project details and recommend the perfect pump setup to meet your dewatering needs.

Benefits of our dewatering pumps:

  • Allow excavation and construction below water table
  • Prevent cave-ins, instability, erosion from excess water
  • Allow crews to work safely without standing water hazards
  • Prevent equipment damage and project delays from excess water
  • Designed for 24/7 continuous pumping even in harsh conditions
  • Available in electric, gas, diesel configurations
  • Powerful pumping capacity removes water quickly
  • Durable pumps stand up to tough dewatering jobs
  • Options for automatic or manual operation

An Pump Machinery is a professional dewatering pump manufacturer. If you require assistance with dewatering pumps, please contact us at or +86 15032857866; our technical sales engineers have considerable product knowledge and will be able to assist you.


Q: How do I determine what pump capacity I need?

A: We'll assess the specifics of your project to determine the optimal gallons-per-minute pumping capacity for your needs.

Q: What power options do your pumps have?

A: We offer electric, gas, and diesel dewatering pumps to match your jobsite's power supply and pumping needs.

Q: Can the pumps be left unattended?

A: Many of our pumps have automatic features so they can operate unattended, shutting off when water reaches a certain low level. We can also provide remote monitoring.

Q: What other dewatering equipment do you provide?

A: In addition to pumps, we also offer pipe, and other accessories and equipment to handle all your dewatering needs at a jobsite.

Let us know if you have any other questions! Our team of experts is ready to provide the perfect dewatering solution for your project.

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